diff --git a/compact/central_tracker.xml b/compact/central_tracker.xml
index e1eb51e9d6a2a1f1e11af9e581e5d39c65242345..98e9656da715d37245aa3a05b8b328301297c761 100644
--- a/compact/central_tracker.xml
+++ b/compact/central_tracker.xml
@@ -212,9 +212,9 @@
       reflect="false">
       <module name="Module1" vis="AnlProcess_Blue">
         <trd x1="TrackerEndcapInnerMod1_x1/2.0" x2="TrackerEndcapInnerMod1_x2/2.0" z="TrackerEndcapInnerMod1_y/2"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
         <module_component thickness="500.0*um" material="Silicon" sensitive="true"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
       </module>
       <layer id="1">
         <envelope  vis="AnlRed"
@@ -224,8 +224,8 @@
           zstart="TrackerEndcapInner_zmin" />
         <ring vis="AnlRed"
           r="TrackerEndcapInner_rmin1+TrackerEndcapInnerMod1_y/2.0"
-          zstart="TrackerEndcapInner_zmin + 1.0*cm"
-          nmodules="12" dz="10 * mm" module="Module1" />
+          zstart="5.0*mm"
+          nmodules="12" dz="5 * mm" module="Module1" />
       </layer>
     </detector>
 
@@ -238,9 +238,9 @@
       reflect="true">
       <module name="Module1" vis="AnlProcess_Blue">
         <trd x1="TrackerEndcapInnerMod1_x1/2.0" x2="TrackerEndcapInnerMod1_x2/2.0" z="TrackerEndcapInnerMod1_y/2"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
         <module_component thickness="500.0*um" material="Silicon" sensitive="true"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
       </module>
       <layer id="1">
         <envelope  vis="AnlRed"
@@ -250,8 +250,8 @@
           zstart="TrackerEndcapInner_zmin" />
         <ring vis="AnlRed"
           r="TrackerEndcapInner_rmin1+TrackerEndcapInnerMod1_y/2.0"
-          zstart="TrackerEndcapInner_zmin + 1.0*cm"
-          nmodules="12" dz="10 * mm" module="Module1" />
+          zstart="5.0*mm"
+          nmodules="12" dz="5 * mm" module="Module1" />
       </layer>
     </detector>
 
@@ -372,9 +372,9 @@
       reflect="false">
       <module name="Module1" vis="AnlProcess_Blue">
         <trd x1="TrackerEndcapOuterMod1_x1/2.0" x2="TrackerEndcapOuterMod1_x2/2.0" z="TrackerEndcapOuterMod1_y/2"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
         <module_component thickness="500.0*um" material="Silicon" sensitive="true"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
       </module>
       <layer id="1">
         <envelope  vis="AnlRed"
@@ -384,8 +384,8 @@
           zstart="TrackerEndcapOuter_zmin" />
         <ring vis="AnlRed"
           r="TrackerEndcapOuter_rmin1+TrackerEndcapOuterMod1_y/2.0"
-          zstart="TrackerEndcapOuter_zmin + 1.0*cm"
-          nmodules="12" dz="10 * mm" module="Module1" />
+          zstart="5.0*mm"
+          nmodules="12" dz="5 * mm" module="Module1" />
       </layer>
     </detector>
 
@@ -398,9 +398,9 @@
       reflect="true">
       <module name="Module1" vis="AnlProcess_Blue">
         <trd x1="TrackerEndcapOuterMod1_x1/2.0" x2="TrackerEndcapOuterMod1_x2/2.0" z="TrackerEndcapOuterMod1_y/2"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
         <module_component thickness="500.0*um" material="Silicon" sensitive="true"/>
-        <module_component thickness="3.0*mm" material="PEEK"/>
+        <module_component thickness="1.0*mm" material="PEEK"/>
       </module>
       <layer id="1">
         <envelope  vis="AnlRed"
@@ -410,8 +410,8 @@
           zstart="TrackerEndcapOuter_zmin" />
         <ring vis="AnlRed"
           r="TrackerEndcapOuter_rmin1+TrackerEndcapOuterMod1_y/2.0"
-          zstart="0.0*cm"
-          nmodules="12" dz="10 * mm" module="Module1" />
+          zstart="5.0*mm"
+          nmodules="12" dz="5 * mm" module="Module1" />
       </layer>
     </detector>
     <!--